Enum MessageChangeKind 

#[non_exhaustive]
pub enum MessageChangeKind {
    Started,
    Content {
        delta: String,
    },
    Ended,
    ToolCallStarted {
        tool_call_id: ToolCallId,
        name: String,
    },
    ToolCallArgs {
        tool_call_id: ToolCallId,
        delta: String,
    },
    ToolCallEnded {
        tool_call_id: ToolCallId,
    },
    ToolResult {
        tool_call_id: ToolCallId,
    },
    Activity,
    EncryptedValue,
}

What happened to a message.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Started

The message was created and is now open for content.

Content

Text was appended.

Fields

delta: String

The text this event appended.

Ended

The message was closed; no more content will arrive for it.

ToolCallStarted

A tool call was attached to the message. Several can be open at once — a model asking for two things at once opens two.

Fields

tool_call_id: ToolCallId

The call’s id.

name: String

The tool being called.

ToolCallArgs

Argument JSON was appended to a tool call.

Parallel calls interleave their events, so consecutive ToolCallArgs need not belong to the same call: tool_call_id is what separates them, and arrival order is the only nesting there is — see the session module docs.

Fields

tool_call_id: ToolCallId

The call being appended to.

delta: String

The fragment this event appended. Rarely valid JSON on its own.

ToolCallEnded

A tool call’s arguments are complete.

Fields

tool_call_id: ToolCallId

The call that closed.

ToolResult

A tool result arrived and was appended as a new message.

Fields

tool_call_id: ToolCallId

The call this result answers.

Activity

An activity was published or patched.

EncryptedValue

A provider’s opaque reasoning blob was attached to the message or to one of its tool calls.

Trait Implementations

impl Clone for MessageChangeKind

fn clone(&self) -> MessageChangeKind

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for MessageChangeKind

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl PartialEq for MessageChangeKind

fn eq(&self, other: &MessageChangeKind) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for MessageChangeKind